Puddling device for type-casting machines



May 15, 1928. 1,669,456

G. L. CURLE PUDDLING DEVICE FOR TYPE CASTING MACHINES Filed May 1, 1925 2 Sheets-Sheet l 1 \u l mu J GEOHGL" L. CURLE .BY HTTOFNEYLS' May 15, 1928.

1,669,456 G. L. CURLE PUDDLING DEVICE FOR TYPE CASTING MACHINES Filed May 1, 1925 2 Sheets-Sheet 2 H9. 3

OOOOOOOOO 00000000 O O O O O O o o o 0 9 0 0 0 O 0 V7 /fa a E C J5 Patented May 15, 1928.

UNITED STATES:

1,669,456 PATENT OFFICE.

GEORGE L. CURLE, OI MINNEAPOLIS, MINNESQTA, ASSIGNOR-TO ROY E. HOLLAND, OE

MINNEAPOLIS, MINNESOTA.

PUDDLING DEVICE FOR TYPE-CASTING. MACHINES.

Application filed May 1,

This invention relates toa type casting machine and particularly to a puddling device used in connection with the molten melting pot of such a machine. As is well known, in certain types of type casting machines the metal is maintained in a molten condition and it is desirable to stir or puddle this metal frequently so that any dirt in the metal will be freed therefrom and forced to the top by the agitation. of the metal. The dirt is skimmed from the top of the pot at intervals. It is also desirable, for otherl reasons, to puddle or agitate the metal in the ot. P It is an object of this invention, therefore, to provide a simple and efficient. puddling device for the metal pot which preferably is operatedby the customary movements of the machine.

It is a-further object of the invention to provide a puddling device for'the metal pot of the t pe casting constituting a lever arm, which. ever has secured thereto an arm carrying a cam member adapted toengage a stationary part of a machine, so that when the part of the machine carrying the metal pot is moved, the cam and said lever will be operated by relative motion of the latter part and the stationary part of the: machine.

These and other objects and advantages of the invention willbe fully set forth in the following description made. in connectionwith the accompanying drawings, in' which like reference characters refer to" similar parts through the different views, and in which Fig; 1 is a view in side elevation of a portion of a type casting machine;

Fig. 2 is a; vertical section through the metal pot containing the puddling device, showi'ngsome parts in side elevation;

Fig: 3' is a top plan View of the puddling device proper; and

Fig. 45' is a view in side elevation of thecam arm used,

Referring to the drawings, particularly Fig. 1, a portion of a type casting machine is shown including thepart of the stationary frame 5 in which is mounted a camshaft 6 having thereon the cam 7, a part of said frame 5 having a fiat top surface 5. In such type casting machines, the portion of the machine includin the melting pot is periodically moved at lntervals-in theoperation of castingaslug. Themovable part of 1925. Serial No. 27,224.

the machine is indicated in Fig. 1 generally as 8, sa-id part carrying the casing 8 thereon, in which casing the melting pot is disposed. The movable part of the frame 8 is arranged to'swing about the shaft 9 as a pivot, said shaft being mounted in the stationary part 5 of the frame. The movable part of the frame 8 has a lug 8, to which is connected a cam roller arm 10, carried in lugs projecting therefrom the cam roller 11. The arm 65.

10 is backed by a spring 12 disposed betweenthesame and the flat base of a bolt or stud 13, which is pivotally mounted-on pivot 1d carried in a depending lug 8 of the portion 8.

The member 13 has a shank passing through spring 12 and through an a'per ture in arm 10 a-nd has a threaded end equipped with a suitable nut, so that the tension of spring 12 may be adjusted. From 15 the described structure, it will be seen that when shaft 6 is rotated, cam 7, acting onthe roller 11, will swing the portion 8', to

'g et henwiththe casing 8*" about the shaft 9", as indicated by the dotted line position of the parts in Fig. 1.

The melting pot disposed in the casing 8 is shown in Fig. 2 as 15, having therein the molten type metal 16. A puddling device or agitator is. provided, comprising a M fiat plate 17 of general rectangular shape somewhat wider at one end than the other and provided with a multiplicity of aper tures or perforations 17. Plate 17 has secured to one endthereof by suitable rivets the lower end of a lever 18, plate 17 being slotted; at one end and turned up slightly at each side of the lever 18. As shown in Fig." 2, the lower portion of lever 18 extendsalmost at a right angle to the main portion thereof. The upper end of lever 18 is curved outwardly and provided with a pair of oppositely extending trunnion pins- 18* adapted tobe disposed in a pair of spaced lugs 15 at the upper edge of pot 15'; The

end of the lever 18' beyond the pins 18 is arranged to project" through an aperture 8 in the casing 8 and is provided with a plurality of holes, one of which is adapted to receive a connecting member connecting said end of the lever to the forked u per end of a cam arm 19 disposed outside 0 the casing 8*; While the connecting member of the parts 18- and 19 may be of various kinds, in the embodiment of the invention dry.

illiiul illustrated, the same is shown as an ordinary cotter pinQO.

The arm 19 comprises a tubular ortion 19 at its upper endin-which is disposed the upper forhed portion 19, the latter belng seated in a coil compression spring 19 in portion 19, said spring seating on the end of the main flat portionot arm 19 which is secured to portion 19 ried by portion 19" extends through a slot 19 in portion 19 and limitsmovement of p0rtionl9 The arm 19 carries at its lower end a cam roller 22 journaled on. a headed or nutted bolt or stud :23. in said arm 19.

In the embodiment of theinvention illustrated the arm 19 is shown as having a widened intermediate portion provided w1th a central apertureor slot 19 This slot in the assembling of the parts alines with an I openmgtl 1n the casing 8 and forms a sight-hole for inspecting the burner which is disposed beneath the melting pot 15. The

arm '19 is also shown as being disposed be tween a pair 01' members Qatand, While these members may take various 'lorms, 1n the embodiment of the invention illustrated,the

same formgaspipes which supply gas to the burner usedto melt the metal.

1 In operation, the parts normally are disposed as shown in Fig. 1. In this position, the roller 22 engages the flat top 5 of the stationary frame 5 and the arm 19 is pushed up "to-tho position shown in full lines in Figs.

1 and 2.. This position of arm 19 swings the outer end of lever 18 upwardly so thatthe pucldling or agitating plate17 is substantially at the bottom of pot-15, as shown in Fig. 2. The plate 17 and level- 18 are made oiistee'l or other material which is adapted to withstand the temperature of the molten metal and theplate 17 tends to float. in, themoltenmetalas it has a lower specific gravity than said metal.

1n the position of the parts shown in full lines in '1 and 2, asabove stated, the

plate 17 is held in the bottomof the pot. As of the frame with the casing 8 is swung about shaft 9, the roller 22 is lifted i. as indicated by the dotted lines inFig. 1

and by the arcuate line 25. As the roller is thus raised, the metai in pot 15 raises the plate 17 andthrough lever18 pushes down on arm 19. This lowers the roller 22 relai tive tothe casing 8 so that the roller in A screw 21 oararound said plate and through the holes 17 The metal in the pot is thus efliciently agitated by the plate 17 every time the portion 8 and casing 8 are swungfor theslug casting operation. The metal in pot 15 is thus kept agitated and uniformly mixed and any dirt therein will be separated from the metal and forced to the top surface thereof. The partlQ" canbe adjusted as desired and connected in any one of the holes in the end oflever 18 to suit the conditions and give the desired movement to the puddler 17.

If any hard object should get under mem ber 17"and. prevent it moving to the bottom of potll5, spring 19? will yield and prevent .86 breaking or bending of arm 19. The spring 19 is, however, suflicientlystitl not to yield appreciably the machine. From the above description it is seen that applicant has provided a simple and efiicient puddling device for. type casting machines. The puddler is automatically operated everytime a slug is cast. The metal is thus cleaned of dirtand suitably mixed and agi tated without any attention from theoperator. [In the presentdevice the temperature of metal 16 is kept uniform by suitable con trolmeans so that the action of the puddling device is quiteunitorm. The parts, ofthe device are few and simple andare positive in operation. h The device has been amply demonstrated inactual practice andfound tobe very suc: cessful and elficieiit. 7 i i l It will, of course,be understood that vari ous changes maybe made in the form, details, arrangement and proportions of the in the ordinary operation of parts without. departing from the scope of applicants invention, which, generally. stated, consists in a device capable ofcarry ing out the objects above set forth, in the.

novel parts and combination of parts disclosed and defined in the appended claims.

What is claimed is: i l

1. A type casting machine haVingincom bination, a movable melting pot, a lever piv-. otally connected to one side of said pot, a

puddling member carried by oneend of said lever and spaced fr01nthe walls ofsaidlpot,

and meansconneoted to the other end of said lever adapted to be engaged inthe moves ment of said pot for actuating said lever and member.

2. A type casting machine, havingin combination a stationary frame, a melting pot movable relatively thereto, a puddling device disposed within saidpot and ofsmaller transverse dimension than the inside of said pot, a member carrying said device and pivoted to said pot and means connected to said member engaging the frame and moved the relative movement of saidpot and frame to operate said puddling device.

3. type casting machine, having in combination, a stationary frame, a melting pot movable relatively thereto, a puddling device disposed in the metal Within said pot, means connected to said device adapted to engage said frame, said puddling device being moved in one direction by the metal in said potand being moved in the other direction by said means engaging said frame in the relative movement of saidpot and frame.

4. The combination of the movable melting pot of a type casting machine, of a puddling device comprising a comparatively fiat perforated plate disposed in the metal in said pot and spaced from the Walls of said pot, said plate having a lever arm fulcrumed on said pot, a. cam arm carrying a cam roller adapted to engage a stationary member and connected to said lever, said cam being moved by engagement of said roller and stationary member in the movement of said pot to move said plate downward in said pot, said plate being movable upward by the metal inset pot, whereby said puddling device is oscillated in said metal. 7

5. A type casting machine having in combination, astationary frame, a casing movable relative to said frame, a melting pot disposed in said casing, a puddling device in said pot carrying a lever fulcrumed on said pot and projecting through said casing, 'a cam arm connected to said lever and disposed Without the casing, having a cam roller adapted to engage said stationary frame, whereby said paddling device is moved in one direction in said pot by relative movement of said casing and frame.

6. A type casing machine having in combination, the pot adapted to contain molten metal, a puddling device of a less area than the inside of said pot disposed therein, and cam controlled means connected to said puddling device for intermittently moving the same through the metal in said pot.

7. A type casting machine having in combination, a pot adapted to contain molten metal, a puddling member of less dimension in plan than the inside of said pot, and means connected to said member for moving the same through the metal in said pot.

In testimony whereof I aflix my signature.

GEORGE L. CURLE. 

